21110100101 has 8 divisors (see below), whose sum is σ = 21903984384. Its totient is φ = 20323272960.

The previous prime is 21110100083. The next prime is 21110100133. The reversal of 21110100101 is 10100101112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21110100101 - 2²⁶ = 21042991237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110100161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1758191 + ... + 1770156.

It is an arithmetic number, because the mean of its divisors is an integer number (2737998048).

Almost surely, 2^21110100101 is an apocalyptic number.

It is an amenable number.

21110100101 is a deficient number, since it is larger than the sum of its proper divisors (793884283).

21110100101 is a wasteful number, since it uses less digits than its factorization.

21110100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528571.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21110100101 its reverse (10100101112), we get a palindrome (31210201213).

The spelling of 21110100101 in words is "twenty-one billion, one hundred ten million, one hundred thousand, one hundred one".